Lighting device



FIG. 1 is a perspective view of a lighting device showing my new design;

FIG. 2 is a front elevational view thereof, the rear being a mirror image;

FIG. 3 is a left side elevational view thereof, the right side being a mirror image;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is another perspective view thereof.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a lighting device, as shown and described. 